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"You could smell gas this morning, but they responded quickly and they've made it a priority to find the leak and sort it.

"As far as I'm aware, they've found the leak, so it's just a case of repairing it and putting everything back now."

The closure is expected to remain in place until Friday afternoon (Image: Daily Post)

Colin Davies, Wales & West Utilities operational manager for Caernarfon, said: "We have been working in Caernarfon to repair a leak on a gas pipe in the Castle Hill Road area.

"Our engineering team worked through the night and have now repaired the leak.

"In agreement with Gwynedd Council and to keep the local community, road users and our colleagues safe while we worked, Castle Hill Road was closed at its junction with St Helen’s Road and Pont Yr Arber.